1Cook ground beef and 1/4 cup of the onions in 10-inch nonstick skillet over medium-high heat, stirring occasionally, until beef is brown; drain well. Stir in barbecue sauce, 3/4 cup of the corn and the chilies. Heat to boiling; reduce heat to low to keep warm.
2Meanwhile, cook potatoes as directed on package using water, milk and butter. Stir in remaining onions and corn; let stand 5 minutes.
3Spoon potatoes onto center of beef mixture, leaving 2 1/2- to 3-inch rim around edge of skillet; sprinkle cheese over potatoes and beef mixture. Cover and let stand about 5 minutes or until cheese is melted. Sprinkle corn chips around edge of skillet.